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Dialogue: 0,0:00:00.20,0:00:05.20,Default,,0000,0000,0000,,Hi I'm Jared, with more KSNN math news you can use.
Dialogue: 0,0:00:07.88,0:00:11.43,Default,,0000,0000,0000,,Did you know the Earth has 24 different time zones?
Dialogue: 0,0:00:11.43,0:00:16.05,Default,,0000,0000,0000,,I know the Earth's day is 24 hours long. Is that why we have 24 zones of time?
Dialogue: 0,0:00:16.05,0:00:22.01,Default,,0000,0000,0000,,Yes. The Earth is a sphere. It is divided into 360 degrees with longitude lines.
Dialogue: 0,0:00:22.01,0:00:24.83,Default,,0000,0000,0000,,I remember those lines are drawn north to south.
Dialogue: 0,0:00:24.83,0:00:28.77,Default,,0000,0000,0000,,The Earth turns 360 degrees in 24 hours.
Dialogue: 0,0:00:28.77,0:00:36.22,Default,,0000,0000,0000,,If you divide 360 degrees by 24 hours it means the Earth turns 15 degrees in one hour.
Dialogue: 0,0:00:36.22,0:00:38.70,Default,,0000,0000,0000,,So time zones are 15 degrees wide.
Dialogue: 0,0:00:38.70,0:00:41.26,Default,,0000,0000,0000,,And that's why we have 24 time zones.
Dialogue: 0,0:00:41.26,0:00:45.30,Default,,0000,0000,0000,,A long time ago cities set their time by the sun's location at noon.
Dialogue: 0,0:00:45.30,0:00:49.25,Default,,0000,0000,0000,,Two cities, a few degrees apart would still have a different time.
Dialogue: 0,0:00:49.25,0:00:52.20,Default,,0000,0000,0000,,Today these cities are in the same time zone.
Dialogue: 0,0:00:52.20,0:00:54.30,Default,,0000,0000,0000,,To learn more visit our website.
Dialogue: 0,0:00:54.30,9:59:59.99,Default,,0000,0000,0000,,Until next time, I'm Jared with cool math news you can use.